Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f55b5bfa1688824…

MALICIOUS

PDF

69.4 KB Created: 2020-04-01 18:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bcaf1065a6ea72883213905b55fb0167 SHA-1: f1728ac156063f8f351f914fbc55c3b45577349b SHA-256: 9f55b5bfa1688824c544fa537daee8808807b3fbfe144cfffd0697075705855c
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a lure related to 'Dragon Quest monsters joker 2 all monsters list' but is primarily composed of a large number of external links to other PDF files hosted on various domains. This indicates a link farm or SEO poisoning tactic, likely intended to drive traffic to malicious sites or to distribute further malware. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://mrskathrynkettering.com/uploads/1/3/1/3/131382346/131382346.html#dragon+quest+monsters+joker+2+all+monsters+list
    • http://africancentury.info/uploads/1/3/1/3/131380308/nolat.pdf
    • http://jessienyc.com/uploads/1/3/0/5/130588754/garav_gukukisewebux_fibativi.pdf
    • http://meaganharringtondiaz.com/uploads/1/3/1/0/131069915/81168af5f.pdf
    • http://doulaauthenticwm.com/uploads/1/3/0/5/130589049/fivedilujitax_makuworurima_wivubebosananu_wobokonujutibes.pdf
    • http://thedroneinvasion.com/uploads/1/3/0/6/130621507/6734023.pdf
    • http://suemoraes.com/uploads/1/3/0/7/130775962/2025638.pdf
    • http://44paige.com/uploads/1/3/0/3/130312961/5898743.pdf
    • http://mail.saicsf.org/uploads/1/3/0/6/130605289/2558292.pdf
    • http://laysautocarwrap.com/uploads/1/3/0/4/130477335/84dbd1158.pdf
    • http://65internet.com/uploads/1/3/0/2/130289603/bafaloxefu.pdf
    • http://suleaccessories.com/uploads/1/3/0/5/130541327/3913272.pdf
    • http://storypalette.com/uploads/1/3/0/3/130323485/606679.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ac.bin
dbb0e727bfc74fbb1961cef8b7307effdbea00337fcedec6eadeeffa84551f10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AC 9000 bytes

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